FIELD: construction.
SUBSTANCE: fire-prevention door comprises a door leaf, includes a frame of metal and external lining with material arranged between them with high heat resistance and mechanical strength. The latter is, for instance, silica-alumina felt in two layers, which are separated with a non-flammable reinforced net, for instance, from glass cloth, graphite fibre. A glue-like mixture of hot-melt glue with flue ash from TPP is applied onto all surfaces of felt, glass cloth and metal structures, and the mixture has the following ratio of components, wt %: hot-melt glue - 40÷60; flue ash - 60÷40.
EFFECT: improved fire-prevention resistance.
1 dwg
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